I never had any luck with those ez start systems either, They typically never lasted very long for me before something on it broke. Plus its just a lot of extra weight on the kit that really isnt needed anyway imho.
My understanding is that in most places SCT racing has lost a lot of popularity and even when it was popular nitro SCT racing I dont think ever really was. Someone may correct me here but thats my understanding and if thats true thats why you dont really see much in the way of nitro SCTs.